Factory replacement 3.1IN, 9MM slide for the P365X. Features Sig's XRAY3 Night Sites mounted on a removable plate to allow for a slide-mounted ROMEOZero optic. Compatible with: P365, P365 SAS (Non-Ported barrel version), P365X, P365XL (requires shorter P365 standard barrel). Optic Mounting pattern: ROMEOZero, Shield RMS-c, J-Point